Gravitational lensing provides one of the best ways to probe matter distribution in the Universe. Strong gravitational lens systems are not only visually spectacular but also teach a great deal about the seen (e.g. galaxies) and the unseen (e.g. dark matter). I mainly use observations of strong lensing to understand matter distribution from galaxy to cluster scales. Recently, I have been developing automated techniques to find strong lenses in large surveys. At Kavli IPMU, I look forward to applying these techniques to data from the SuMIRe project and intend to further our understanding of matter distribution using strong lensing.